Solid wire

Abstract

Provide a solid solder wire which can be easily straightened even in a solid solder wire having a wide wire diameter. A solid solder wire includes C: with the mass of being 0.02 mass% or more and 0.20 mass% or less, Si: being 1.0 mass% or less, Mn: 0.8 mass% or more and 2.7 mass% or less, and rest Fe and unavoidable impurities. The balance consisting of Fe and inevitable impurities, the wire diameter is 1.6 mmPhi or more, the Mn inclusions are distributed in the steel structure, and among the Mn inclusions, the Mn content Of 1.0 mass% or more and 30 mass% or less and a maximum diameter is 0.05 [mu]m or more and 10 [mu]m or less; and 10 or more exists in per 1000 [mu]m 2 of a wire cross-sectional area.

Description

technical field [0001] The present invention relates to a solid welding wire used for welding high-strength steels of 490 MPa or higher, especially for submerged arc welding. Background technique [0002] Submerged arc welding is widely used in various industrial fields as an efficient welding construction method combining flux and welding wire. The welding wires used include solid wires and flux-cored wires, and the suitable wire diameters range from small diameters such as 1.2 mm to large diameters such as 6.4 mm. [0003] In particular, the large-diameter solid wire has a high tensile strength, so it is not easy to straighten the wire to make it straight, and it is difficult to adjust the straightening by the wire straightening device during welding. If the straightness of the wire cannot be maintained due to insufficient straightening of the wire, there may be problems such as formation of a meandering weld lacking in straightness, or target deviation in the groove, res...

AI Technical Summary

Problems solved by technology

[0012] However, the welding wires for submerged arc welding and the copper-coated solid wires for gas shielded arc welding described in Patent Documents 1 to 4 are not sufficient for straightening large-diameter wires.

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